Tests of Difference: Mann-Whitney & Wilcoxn (AQA A-Level Psychology): Flashcards
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Inferential tests definition
Inferential tests definition
Statistical procedures to determine if differences are significant or due to chance
Data level used by Mann-Whitney & Wilcoxon
Data level used by Mann-Whitney & Wilcoxon
Ordinal data (ranked data)
When to use Mann-Whitney U test
When to use Mann-Whitney U test
Independent groups design with ordinal data
Mann-Whitney significance criterion
Mann-Whitney significance criterion
Calculated U ≤ critical value
When to use Wilcoxon signed-rank test
When to use Wilcoxon signed-rank test
Repeated measures design with ordinal data
Wilcoxon: handling zero differences
Wilcoxon: handling zero differences
Exclude zero differences from ranking process
Wilcoxon T value calculation
Wilcoxon T value calculation
Sum of ranks for less frequent sign
Wilcoxon significance criterion
Wilcoxon significance criterion
Calculated T ≤ critical value
Key difference: Mann-Whitney vs Wilcoxon
Key difference: Mann-Whitney vs Wilcoxon
Mann-Whitney=independent groups; Wilcoxon=repeated measures
Non-parametric tests characteristic
Non-parametric tests characteristic
Don't require data to follow normal distribution